Control method of soft-reduction depressed region of wide and thick plate continuous casting blank
A control method and soft reduction technology, which is applied in the field of soft reduction control of continuous casting technology, can solve problems such as uneven growth of slab shells, degradation of rolling plates, and transverse cracks at corners
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[0044] Example 1
[0045] The selected peritectic steels with the cross-sectional dimensions of the billet are 2100mm×250mm, 1600mm×300mm and 2300mm×180mm respectively, and the target composition contains C0.17%, Si0.15%, Mn0.60%, P≤0.015% by weight percentage, S≤0.015%, the balance is Fe; the casting temperature is 1545℃, and the pulling speed is 0.9~1.1m / min;
[0046] A two-dimensional solidification heat transfer calculation model is established. The heat transfer of the slab in the secondary cooling zone is mainly composed of radiation, roller contact heat transfer and secondary cooling convection heat transfer. The convective heat transfer coefficient of the secondary cold water is The calculation method can be expressed as:
[0047] h w i = α i · W i ( x ) 0.5...
PUM
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